My husband had a business trip, so I tagged along with him and did a little siteseeing while he was working.
ーMy husband had a business trip, so I tagged along with him and did a little sightseeing while he was working.
「夫が出張だったので、私も便乗して夫の仕事中観光をした」
a business trip で「出張」
to tag along で「ついて行く・付き添う」
sightseeing で「観光・観光旅行」
ご参考まで！
カナダ 
